The Reversal of My Life as a Side Character

The Reversal of My Life as a Side Character summary:

In the midst of a repetitive and boring everyday life, a game appeared as if it were fate*Heroes Destiny*. After spending ten years playing it, I finally completed the game, but all that remained was the emptiness of having to return to an ordinary life. At that moment, a message appeared on the screen: "Do you desire a new adventure? [Yes/No]." Little did he know that he would wake up in an unfamiliar body and an unknown place. "Remember, I am now Calix Shaekin." And thus "I will become the protagonist of this world!"